my btb6 d string tuner is having problems. the shaft that the string wraps around seems to have "detached" from the part w/ the knob that is twisted by hand. does that make any sense? I've put the shaft part back in, tightened it w/ a screwdriver - etc, but when i tighten it (new strings), it just snaps and detaches again. Anyone have any ideas or had this problem? I'm kind of extremely broke, so if it involves buying a whole new tuner, I'm going to have to shelve my 6 for a while (leaving me w/ my OLP 4 hehe).